I have a room which is a rectangle 5000qf aprox I want to fill it with my music. I have a Marantz SR5013, 7.1. Two of the channels can be used as Zone 2. I was thinking to use it as a 5.1 home theater so I can use Zone 2 channels to put two loudspeakers in the back corners to play music for parties or listen music with a whole surround environment. Can this setting work as quadraphonic or four loudspekers stereo? What would it be the result? By the way, the front speakers are Bronze 5 and the back are Bronze 2. If that is not possible or causes more noice than music, would you recommend to place the four speakers in the front in stereo mode, with my bronze 1 for surround?